A method and system for direct audio capture and identification of the
captured audio. A user may then be offered the opportunity to purchase
recordings directly over the Internet or similar outlet. The system
preferably includes one or more user-carried portable audio capture
devices that employ a microphone, analog to digital converter, signal
processor, and memory to store samples of ambient audio or audio features
calculated from the audio. Users activate their capture devices when they
hear a recording that they would like to identify or purchase. Later, the
user may connect the capture device to a personal computer to transfer
the audio samples or audio feature samples to an Internet site for
identification. The Internet site preferably uses automatic pattern
recognition techniques to identify the captured samples from a library of
recordings offered for sale. The user can then verify that the sample is
from the desired recording and place an order online. The pattern
recognition process uses features of the audio itself and does not
require the presence of artificial codes or watermarks. Audio to be
identified can be from any source, including radio and television
broadcasts or recordings that are played locally.